Lambda Function

Definitions

1. In cloud computing, a serverless compute unit (named after AWS Lambda) that runs code in response to events — such as HTTP requests, queue messages, or file uploads — without provisioning or managing servers, billed per invocation and execution duration. In programming languages, a small anonymous function defined inline.

   In plain English: A small piece of code that runs in the cloud only when something triggers it, and you only pay for the exact time it runs.

   Example: "Each image upload triggers a Lambda function that generates thumbnails and writes them to S3."

Related Terms

• Horizontal Scaling
• Lambda
• Cold Start
• Parameter Passing
• Pass by Reference
• Pass by Value
• Scale Out
• Scale Up
• Calling Convention
• Composable Function